A beaker with 145 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 8.50 mL of a 0.350 M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.